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題名 An adaptive access method for broadcast data under an error-prone mobile environment 作者 陳良弼
Lo,Shou-Chih
Chen,Arbee L. P.貢獻者 資科系 日期 2000-07 上傳時間 21-Aug-2014 15:08:34 (UTC+8) 摘要 A ubiquitous information environment can be achieved by the mobile computing technologies. In this environment, users carrying their portable computers can retrieve local or remote information anywhere and at anytime. Data broadcast, with its advantages, has become a powerful means to disseminate data in wireless communications. Indexing methods for the broadcast data have been proposed to speedup access time and reduce power consumption. However, the influence of access failures has not been discussed. For the error-prone mobile environment, the occurrence of access failures is often due to disconnections, handoffs, and communication noises. Based on the distributed indexing scheme, we propose an adaptive access method which tolerates the access failures. The basic idea is to use index replication to recover from the access failures. One mechanism, named search range, is provided to dynamically record the range where the desired data item may exist. According to the search range, an unfinished search can be efficiently resumed by finding an available index replicate. A performance analysis is given to show the benefits of the method. Also, the concept of version bits is applied to deal with the updates of the broadcast data 關聯 IEEE Transactions on Knowledge and Data Engineering (EI,SCI),12(4),609-620 資料類型 article dc.contributor 資科系 en_US dc.creator (作者) 陳良弼 zh_TW dc.creator (作者) Lo,Shou-Chih en_US dc.creator (作者) Chen,Arbee L. P. en_US dc.date (日期) 2000-07 en_US dc.date.accessioned 21-Aug-2014 15:08:34 (UTC+8) - dc.date.available 21-Aug-2014 15:08:34 (UTC+8) - dc.date.issued (上傳時間) 21-Aug-2014 15:08:34 (UTC+8) - dc.identifier.uri (URI) http://nccur.lib.nccu.edu.tw/handle/140.119/69148 - dc.description.abstract (摘要) A ubiquitous information environment can be achieved by the mobile computing technologies. In this environment, users carrying their portable computers can retrieve local or remote information anywhere and at anytime. Data broadcast, with its advantages, has become a powerful means to disseminate data in wireless communications. Indexing methods for the broadcast data have been proposed to speedup access time and reduce power consumption. However, the influence of access failures has not been discussed. For the error-prone mobile environment, the occurrence of access failures is often due to disconnections, handoffs, and communication noises. Based on the distributed indexing scheme, we propose an adaptive access method which tolerates the access failures. The basic idea is to use index replication to recover from the access failures. One mechanism, named search range, is provided to dynamically record the range where the desired data item may exist. According to the search range, an unfinished search can be efficiently resumed by finding an available index replicate. A performance analysis is given to show the benefits of the method. Also, the concept of version bits is applied to deal with the updates of the broadcast data en_US dc.format.extent 283 bytes - dc.format.mimetype text/html - dc.language.iso en_US - dc.relation (關聯) IEEE Transactions on Knowledge and Data Engineering (EI,SCI),12(4),609-620 en_US dc.title (題名) An adaptive access method for broadcast data under an error-prone mobile environment en_US dc.type (資料類型) article en
